Authors
SA Umoren, IB Obot, EE Ebenso, PC Okafor, O Ogbobe, EE Oguzie
Publication date
2006/9/1
Journal
Anti-corrosion methods and materials
Volume
53
Issue
5
Pages
277-282
Publisher
Emerald Group Publishing Limited
Description
Purpose
–
To investigate the inhibitive effect of gum arabic (GA) for the corrosion of aluminium in alkaline (NaOH) medium and determine its adsorption characteristics. The present work is another trial to find a cheap and environmentally safe inhibitor for aluminium corrosion.
Design/methodology/approach
–
The inhibition efficiency (%I) has been evaluated using the hydrogen evolution (via the gasometric assembly) and the thermometric methods at 30 and 40°C. The concentrations of GA (inhibitor) used were 0.1‐0.5 g/l and the concentrations of NaOH (the corrodent) were 0.1‐2.5 M. The mechanism of adsorption inhibition and type of adsorption isotherms were proposed from the trend of inhibition efficiency with temperature, Ea, ΔGads and Qads values.
Findings
–
GA inhibited the corrosion of aluminium in NaOH solutions. The inhibition efficiency increased with increase in GA concentration and with increase in …
Total citations
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Scholar articles
SA Umoren, IB Obot, EE Ebenso, PC Okafor, O Ogbobe… - Anti-corrosion methods and materials, 2006